Spectacle frame`s rim groove contour scanning method for optician, involves pointing tracing stylus obliquely towards rim and towards its rear side so that its sensing axis or sensing plane forms non-null sensing angle with plane

摘要

The method involves contacting a tracing stylus (9) of a sensor (8) against a base of a groove, where the stylus extends along a sensing plane. The sensor is moved along the groove to trace the base while rotating about an axis of rotation. The tracing stylus, when arranged in a temporal region of a rim of the frame, points obliquely towards the rim of the frame and towards its rear side designed to be arranged opposite to a wearer`s eyes, such that its sensing axis or its sensing plane forms a non-null sensing angle (A1) with a plane orthogonal to the axis of rotation of the sensor.